Klixon® thermostats have been inproduction for over 50 years. The20413, 20600, and 20650 seriesthermostats are especially designeded for applications where space,capacity and ease of assembly areimportant production factors. Theyare fixed-setting, snap-acting, auto-matic or manual reset temperaturecontrols that are ideal for suchapplications as: air conditioners,heating and ventilating equipment,vending machines, dryers, unitheaters, tabletop appliances, etc.

The switch mechanism is actuatedby the Klixon snap-action, bimetaldisc which may be enclosed orexposed. Enclosed disc devices areparticularly recommended for appli-cations in which dust and lint areprevalent in the environment.Exposed disc types are used inapplications where a faster thermalresponse to radiant heat is needed.Contact parts are enclosed for bothdisc types for protection againstcontamination.

Mountings and Terminals

A variety of terminals and mountingflanges are available to meet instal-lation requirements of mostapplications.

Flanges can be used for surface orthru-wall mountings; or, thermostatscan be supplied without flanges forwell or cavity-type mountings.Flange rotations are specified bylooking down on the terminals androtating the flange 30o, 45o, or90o CW or CCW.

Electrical connections to the ther-mostat must be tight; otherwise,resistance in a loose connection maycause sufficient temperature rise toaffect the performance of the ther-mostat or damage the terminals orthe lead wire insulation.

The ranges of temperature settings,tolerances, and nominal differen-tials shown below are available.Differential is the differencebetween opening and closing tem-perature in oF. For example, athermostat which opens at 180oFand closes at 140oF has a 40odifferential. (Lowest unit prices areachieved by selecting differentialsin the 30oF to 59oF range). Fortemperature settings and differen-tials other than those shown,please consult Marketing.

Manual ResetConstruction

There are two basic manual resetconstructions:

1) Manual Override ­ contracts can

be closed at any time afterdevice has actuated by depress-ing reset button.

2) Trip-Free ­ contacts will remain

open after device has actuateduntil bimetal disc resets, even ifreset button is depressed.

Agency Recognition

Klixon 206 Series Thermostats arerecognized by UL and CSA. Pleaseconsult Marketing for internationalapprovals.

20600 series ­ up to 350o20650 / 54 series ­ up to 300o; minimumdifferential 30o.

Ambient Temperature

-40oF to +350oF-40oC to +177oC

Underwriters' Laboratories Electrical Current Ratings

Standard Configurations

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Texas Instruments assumes no responsibility for infringement of patents or rights of others basedon Texas Instruments applications assistance orproduct specifications since TI does not possessfull access concerning the use or application ofcustomer products. Texas Instruments alsoassumes no responsibility for customers' productdesigns.